Lock



' Dec. 8, 1942.

H. G. VOIGHT 2,304,612

LOCK

Filed July 7, 1938 4 Sheets-Sheet 5 Ill Dec. 8, 1942. VOIGHT 2,304,612

LOCK

Filed July 7, 1958 4 Sheets-Sheet 4 l fl LII K 95; W 6420144 my;

Patented Dec. 8, 1942 LOCK Henry G. Voight, New Haven, Conn., assignor to New Haven, Conn., a cor- Sargent & Company, poration of Connectic Application July 7, 1938, Serial No. 217,854

. (Claims.

This invention relates to door locks, and more particularly to a lock construction or system which will be universal in character, in that it comprises a case and a number of lock parts which may be assembled in the case in various combinations to construct locks having different characteristics.

There are a number of different kinds of locks employed upon doors, the character of the looks or latches depending upon the particular situation or location of the door, that is, depending upon the use to which the door upon which the lock is mounted is to be put. For example, there is the simple door latch which contains only a latch bolt and no other mechanism, which is used upon doors merely to keep them closed, but which are never intended to be locked. There is also what may be termed a bathroom door lock, which comprises a latch bolt, and in addition may have a single dead bolt adapted to be thrown by a thumb turn upon one side of the door. A communicating door lock is usually provided with a latch bolt and with two dead bolts, one of which may be thrown from one side of the door and the other from the other side, a thumb turn usually being employed in connection with both of such bolts. There is also a lock which may be termed a vestibulev door lock, which comprises a latch bolt, and a dogging mechanism for this bolt, this mechanism usually being operated by adogging lever pivoted in the face plate of the lock. Usually such dogging mechanism serves to dog the outside knob, and a key-operated mechanism is provided for retracting the latch from the outside when the knob is dogged. There is also what is known as a front door look. This lock not only contains the latch bolt and latch dogging mechanism, or knob dogging mechanism of the vestibule door, but also contains a dead bolt usually operated by a thumb turn at the inside of thedoor, key-operated means for retracting the latch from the outside when the knob is dogged, and also retracting the dead bolt when it has been thrown. .A sixth kind of lock is what may be termed an office door lock, which look comprises the latch and knob dogging mechanism of the vestibule lock, and also a latch dogging lever and a dog-controlling plunger which projects through the face plate of the look. This dog-controlling plunger operates to prevent the forcing of the latch by a tool inserted between the edge of the door and the door jamb. The office door lock is also provided with key-operated means to retract the latch when the outside knob is dogged.

In the past these locks and the parts therefor have all been individually made, that is, the cases in which the locks were housed were cases especially made for the particular type of lock which was to be employed, and the internal mechanism was individual to the lock in which it was to be used in each case. to have a full stock, must keep on their shelves a of lock, and the manufacturer likewise had to make up and stock a large quantity of each type of locks, notwithstanding the fact that certain parts of each type of lock were common to other types. This resulted not only in the necessity of keeping a large inventory, but also in the manufacture of a large number of parts, some of which differed slightly from others, or perhaps quantity production. One object of the a lock are provided which may be assembled in this case in different combinations to provide the particular type of lock desire A further object of the invention is the prow'sion of a system of locks which will be more or less universal in character, in that the same case and the same parts to a large extent may be used for looks of different types, whereby some of the types of locks having a more complex character, for example, may be made or converted from a simpler type of lock, merely by the insertion in the case of additional parts.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the drawings:

Fig. 1 is a front elevational view of a latch with the cover of the case removed;

Fig. 2 is a sectional view on line 22 Fig. 3 is a sectional view on line 3-3 Fig. 4 is a perspective view of the side face plate of the lock case;

Fig. 5 is an elevational view of the interior of a bathroom door lock;

Fig. 6 is a face view of the lock shown in Fig. 5;

Fig. 7 is a sectional view on line '!-1 of Fig, 5;

Fig. 8 is a sectional view on line 88 of Fig. 7;

Fig. 9 is a sectional view on line 9-9 of Fig. 8;

Fig. 10 is a perspective view of the dead bolt and thumb-tum hub connected thereto;

Fig. 11 is a perspective view of the supporting of Fig. 1; of Fig. 2; plate and As a result, dealers, in order angle member used with the dead bolt of Fig. 10;

Fig. 12 is a view similar to Fig. showing the interior mechanism of a communicating door lock;

Fig. 13 is a view similar to Fig. showing the additional dead bolt used in the look shown in Fig. 12;

Fig. 14 is a view similar to Fig. 12 showing the interior mechanism of a vestibule lock;

Fig. 15 is a front, face view of the lock shown in Fig. 14;

Fig. 16 is a sectional view on Fig. 14;

Fig. 1'7 is a sectional view on line i1-l1 of Fig. 14;

Fig. 18 is a per pective view of the latch of the knob dogging member shown in Figs. 14 and 16;

Fig. 19 is a perspective view of the clip which guides the knob dogging member in its movement;

Fig. 20 is a view similar to Fig. 14 showing the line 18-16 of interior of a front door lock;

Fig. 21 is a sectional view Fig. 20;

Fig. 22 is a sectional view on line 22-42 of Fig. 20;

Fig. 23 is a front view of the dead bolt of the lock shown in Fig. 20 and the operating mechanism therefor;

Fig. 24 is an exploded view showing the rollback assembly of the lock shown in Fig. 20;

Fig. 25 is a rear view of one of the rollback members shown in Fig. 2 1;

Fig. 26 is a view similar to Fig. 20 showing the interior mechanism of the office door lock;

Fig. 27 is a face view of the same;

Fig. 28 is a detail view of part of the mechanism of the lock shown in Fig. 26 but showing this mechanism in another position; and

Fig. 29 is an exploded view of the dog-controlling plunger and its associated parts of the lock shown in Fig. 26.

In Figs. 1 to 4 of the drawings, I have shown the simplest form of door closure, in which the lock case is provided with a latch only. As will be seen from these figures of the drawing, the case comprises side plates I0 and H. Formed integrally with the plate H1 is the face plate I2 provided with an opening 13 at approximately the center thereof, through which the latch bolt l4 may protract. This plate 10 may be considered as the base or supporting plate of the lock, while the plate ll operates as a cover or retaining plate. In addition to these two plates, the lock case is provided with a cover l5 which may be formed of thin sheet metal, and which may be of U-shaped design, as shown in Fig. 1, to cover the top and bottom and rear end of the case extending from one of the side plates to the other. This cover lies between the plates and is substantially flush with the edges thereof, and, as will be apparent, the corner posts It and 11 are set in from the edges of the lock for this purpose.

The construction of the plate I0 is shown more particularly in Fig. 4, and as this plate is to be used as a part of the case for a number of different locks, it is provided with some elements which are not employed in the simpler type, as in the latch at present being described. As shown, the plate is provided with three upstanding posts l6, l1 and 18, these posts having on line 21-21 of screw-threaded bores designed to receive screws (not shown) extending through the plate or cover II to secure the latter in position. The plate is also provided with openings 19, 20, 2| and 22, the purpose of which will be later described, and also with short posts 23 and 24 designed to serve as spring-supporting hubs, and a longer spring-supporting hub post 25.

It will be understood that the plates l0 and II will be normally concealed within the door, and that outside plates 26 and 21, more or less ornamental in character, are provided to be applied at each face of the door. As the lock herein shown is of that character usually called a unit lock, it is entirely assembled, including the plates 26 and 21, before being applied to the door. The plate 21 is provided with hollow posts 28, only one of which is shown, but two of these posts will usually be provided, which will enter through the openings 19 and 20 in the plate III, the plate 21 being secured to the plate ID by means of screws 29 and 30, which pass through openings 3| and 32 of the plate 10. The plate 26 may then be secured to the case by means of screws 33, which are threaded into the posts 28, the length of the posts and screws being such that adjustment is possible in the spacing of the plates 26 and 21 in accordance with the thickness of the door upon which the lock is secured. The plates 26 and 21 may be secured to the door by means of screws 34 and 35.

The latch bolt 14 is mounted upon a stem 35 riding in a groove 31 in an upstanding lug 38 attached to the plate II]. A compression spring 39, acting between this lug and the rear face of the bolt, tends to urge the bolt to projected position] At its rear end the stem is provided with a stop element 40, and between this stop element and the lug 38 the stem is spanned by the forked end 4| of a yoke 42, the end 4| being turned at approximately right angles to the yoke. The portion 41 of the yoke also spans a guide member 43 secured to the plate I0 so that the yoke will be properly guided in its reciprocating movements.

At its rear end the yoke 42 is provided with angularly turned end portions 44 and 45, which are provided with notches 46 and 41 to receive and be guided by elongated guide lugs 48 and 49 formed on the plate Ill. The free ends of the members 44 and fit against the plate I0, and

spacing lugs 50 and 5! are formed on the plate H to bear against the outer face of the yoke so that the yoke will be held against play, but permitting a sliding reciprocating movement in the lock.

The plates [0 and H are respectively provided with knob-shank-receiving sleeves 52 and 53, in which aretelescopically received the shanks 54 and 55 of the outer knob 56 and'the inner knob (not shown). The knob shanks are provided with annular grooves 51 and 58, and the ends of L-shaped retaining members 59 and 60 extend into these grooves through openings in the sleeves 52 and 53 to secure the knob shanks in place, these retaining members being detachably secured by screws to bosses GI and 62 formed on the plates l0 and II, respectively. A spacing member 63 extends between the knobs, and on this spacing member rollbacks 64 and 65 are rotatably mounted one adjacent each end thereof. The projecting arms of these rollbacks are engaged within recesses 66 formed in the ends of the knob shanks, so that the turning of the knob shanks by the knobs will rotate the rollbacks in the usual manner to retract the yoke 42 and the latch bolt M. It will be understood that the bolt is urged outwardly by the spring 39, and the movement of the bolt outwardly also carries with it the yoke 42 by reason of the engagement of the stop member 40 against the rear side of the turned end 4| of the yoke member. The bolt l4, however, is permitted to move inwardly when the door is closed, for example, independently of the yoke 42, the latter being held in place at this time by a spring 61 mounted upon the post 25, having one end bearing against a post 68 on the yoke, and the other end bearing against a post 69 formed on the plate II).

In Figs. 5 to 11 of the drawings is shown a lock of the type usually known as a bathroom door look. This lock contains the parts already described in connection with the latch bolt lock shown in Figs. 1 to 4, and in addition contains a dead bolt which may be thrown from one side of the door to lock the same. The head of this dead bolt is shown at 70, the bolt being adapted to project through an opening 1| in the face plate I2 formed at a position spaced from the opening for the latch bolt. This dead bolt is provided with a guide stem 12 slidably received in an opening 13 in an L-shaped guide lug 14 (Fig. 11), which is secured to the plate ill by means of a screw passing through the base of the lug and threaded into an opening 15 in this plate.

To the head of the bolt is pivoted one end of a link 16, the other end of the link being pivoted to an arm 11 secured to a thumb-turn hub 18, the latter being provided with reduced end portions 19 received in openings 2| .in the plates I and II, whereby the thumb-turn hub is rotatably mounted between these plates. The hub is provided with a non-circularv opening 80, within which is received a similarly shaped spindle 8| of the thumb turn 82 by which the bolt 18 may be operated at one side of the door.

The thumb-turn hub is also provided with fiat surfaces 83 and 83*- designed to be engaged by one end of a spring 84 in order to releasably hold the thumb turn and the bolt 'llJ in position at the ends of its movement. The spring 84 is mounted upon the post 24 (Fig, 4) on the plate NJ, the other end of this spring bearing against the lug 38. The operation of the dead bolt 10 and its associated parts is believed to be obvious. It will be observed that this bolt and its associated parts may be placed in the case of the latch bolt mechanism illustrated in Figs. 1 to 4, without disturbing the action of the latch bolt, as the dead bolt and its operating mechanism are added at one corner of the case out of the range of action of the latch bolt and its actuating mechanism. Moreover, the only part necessary to secure this additional mechanism in place is the L-shaped guide member 14 shown in Fig. 11, which may be easily and detachably secured in place, so that the latch illustrated in Figs. 1 to 4 may be readily and easily converted into the bathroom door lock shown in Figs. to 11 by the addition of these few extra parts in the same case, and, of course, the provision of the additional opening H in the face plate l2.

In Figs. 12 and 13 of the drawings is illustrated what may be termed a communicating door look. This lock is similar to the bathroom door lock described immediately above, except that in addition it is provided with a second dead bolt and actuating mechanism designed to be operated at that side of the door opposite from that of the first. In this case the face plate l2 will be provided with an additional openin ll, through which may operate the dead bolt 10, which is provided with actuating and guiding mechanism duplicating that shown in Figs. 10 and 11 in connection with the dead bolt 10. i As these parts have already been described in connection with Figs. 5 to 11, it is not believed that an additional description is necessary. It may, however, be observed that the thumb-turn hub 18 is provided I with an arm 85, the purpose of which will appear hereinafter, which arm is not provided upon the thumb-turn hub l8 used in connection with the bolt 10. It will also be observed that the dead bolt 10 and its associated parts are placed below the latch bolt M in a positionsymmetrlcal with that of the bolt 10 and its associated parts, and as the latch bolt I 4 and its actuating mechanism is disposed centrally of the case, there will be room for both of the dead bolts and their actuating mechanisms without interference with the action of the latch bolt. Thus by the addition of one set of relatively few parts the latch may be converted into a bathroom door lock, and

by the addition of a duplicate set of parts in a symmetrical position in the case, the bathroom door lock of Fig. 5 may be converted into the communicating door lock of Fig. 12.

In Figs. 14 to 19 of the drawings is illustrated what may be termed a vestibule lock, this look being derived from the latch shown in Figs. 1 to 4 by the addition of a stop work or knobdogging mechanism, and a key-operated lock provided in the outside knob.

In this instance the face plate I2 is provided with an opening 86 in which is pivotally mounted upon a pin 81 in the face plate a stop work or dog-actuating member 88. To one end of this member is pivoted at 89 a dogging link 90 adapted for sliding movement in the case, and guided below the turned end 9| of a guide lug 92 detachably secured to the case by a screw passing through the base of this lug and into a screw opening 93 (Fig. 4) in the plate 10. The part of the link engaging this lug is offset, as shown in Fig. 14, from the forward part of the link pivoted to the member 88, and the link is also provided with an additional offset end 94 designed to be moved through a slot 95 in the sleeve 52 of the outer knob and engage in a recess 96 formed in the shank 91 of the knob 98.

In this instance the knob shank'91 is hollow, and mounted therein is a cylinder lock mechanism 99 which may be of any approved form, the lock being adapted to rotate a non-circular spindle I00, extending into the case and having non-rotatably mounted thereon the hub I0! of a. rollback I02, the arms of which rollback are adapted to engage the turned ends 44 and 45 of the yoke 42, It will be observed that in this instance an additional rollback has also been added to the mechanism, which is secured to the hub I 0| this hub being operated by the lock spindle I00 independently of the knobs. Secured to the under portion of the link 90 is a spring I84 having a V-shaped portion I05 adapted to engage a similarly shaped member I86 (Fig. 4) provided on the plate ID. This spring acts to releasably retain the operating member 88 and link 90 in the position to which it is moved, in one of which positions it dogs the outside knob by means of engagement with the shank thereof of the part 94, and in the other position leaving this knob free to turn. It will, of course, be understood that when the outside knob is dogged, the latch may be withdrawn by means of a key inserted in the cylinder lock 99 and turning the spindle I00. The inside knob, being free to operate independently of the outside knob, may always be employed to withdraw the latch.

The opening 86 in the face plate I2 ls preferably of the same size as the opening I I which receives the dead bolt as shown in Fig. 12, and in the same position. The ends of the opening 86 may, however, be countersunk, as shown at I01, so as tn permit engagement of the lever 88 by the fingers.

In Figs. 'to of the drawings I have shown a lock of the type which is ordinarily used as a residence front door-lock. This lock contains a dead bolt in addition to the latch bolt and stop work or knob dogging mechanism illustrated in connection with the vestibule lock shown in Figs. 14 to 19, The dead bolt in this instance is adapted to be operated by a thumb turn at the inside of .the door, and to be key-operated from the outside of the door by a cylinder lock mechanism, shown, for example, in Fig. 17. That is, in this instance the key-operated lock, which may be mounted in the knob, is not only adapted to withdraw the latch, as was the case with the vestibule lock, but is operate the dead bolt from the outside of the door. converted into the front door look by the addition of the dead bolt and thumb-turn mechanism to the structure shown in Fig. 14, and also with the use of a different type of rollback mechanism to be operated by the key, as will now be described.

Mounted in the upper part of the case of the lock, as illustrated in Fig. 20, is a dead bolt mechanism of the type shown in Fig. 10, the hub I8 of this dead bolt mechanism being provided with the arm 85, as shown in that figure. It is understood, of course, that this structure is in addition to the lock parts shown in Fig. 14.

Pivoted to the arm 85 is a rearwardly extending link or actuating member H0, this member being provided with a notch III and a transversely turned rear end portion I I2, the member Ht serving as the operating member of the dead bolt when it is operated by a key. As shown in Fig. 21, the member Hll extends through a recess H3 formed in the transversely extending portion Ml of the yoke 42, and the transversely turned end H2 of this member will be engaged by the member 84 when the yoke 52 is retracted.

The rollback mechanism used in this particular lock is shown in Fig. 24. Instead of employing the spacer 63 between the knob shanks, however, there is employed in this lock a hub H6 carrying an operating finger H5 having a beveled portion IIB adjacent its end. The knoboperated rollbacks El and 65 are the same as those shown in connection with Figs. 1 to 4. The hub member is provided with a non-circular opening to receive the lock spindle I00, and upon a portion of this hub member is rotatably mounted a rollback I", this rollback carrying upon'one face thereof a resilient or spring member H8 secured to the rollback at one end, as by the rivet H9. Upon the other end of the also adapted to The vestibule lock may, therefore, be

spring is carried a pin I20 which extends through an opening in the rollback member to project therefrom on the side thereof opposite the spring. It will be seen, therefore, that this spring lies flatly upon one'side of the rollback member in its normal position, with the pin projecting from the other side. Pressure exerted upon the'pin, however, may lift the untouched end of the spring member from the rollback so that the pin will no longer project therefrom. The finger H6 on the hub member H4 is designed, as will be explained, to engage this pin to operate the rollback H1, when turned in one direction, but on account of the beveled portion H6 will cam the pin inwardly and pass thereunder when the rollback is rotated in the opposite direction. The finger H5 is also designed to engage in the notch III and operate the member H0. Except as described, the front door lock is similar in construction to the vestibule lock,

The operation of this lock will now be briefly described. If it is merely desired to dog the outside knob to prevent retraction of the latch bolt, this operation is effected by manipulating the member 88 as in the case of the vestibule lock, which dogs the outside knob. The latch may now be retracted from the outside only by means of the key, which is operated to rotate the hub H4 in the proper direction to engage the fiat or unbeveled side of the finger H5 with the pin I20. This actuates the rollback II! to withdraw the latch.

If, however, it is desired to deadlock the door, this may be done by the thumb turn from the inside, which throws the bolt I0, or by the key from the outside. The key through the lock mechanism 99 operates the spindle I00, which in turn rotates the hub H4 carrying the finger H5. This hub is normally in the position shown in dotted lines in Fig. 23, and isrotated by the key in a counterclockwise direction, as shown in this figure, to engage in the recess I I I of the link H0, which through its connection with the arm turns the hub 18, to which this arm is attached, and throws 0r protracts the bolt 10. It is, of course, necessary to turn the key through the remainder of a complete revolution in order to extract it from the lock, and when this is done the beveled or inclined surface I IE on the finger H5 strikes the pin I20, but does not operate the rollback, asv this inclined surface merely cams the pin upwardly against the action of the spring H8, and permits the finger H5 to pass below the pin to its normal position, permitting withdrawal of the key. The door may be readily opened from the outside by use of the key, which is inserted in the lock and turned in a direction to turn the finger H5 clockwise from its dotted line position, shown in Fig. 23. At this time the straight side of the finger H5 strikes against the pin I20 and turns the rollback III, the arm of which strikes against the arm 44 of the yoke 42 and withdraws the latch bolt. At the same time the arm 44 strikes against the turned end H2 of the link H0, and also withdraws the dead bolt. Thus in the opening of the door with the mechanism shown, the dead bolt and latch bolt are withdrawn simultaneously, and separate operations of the key are not required for this purpose, as has usually been the case in prior locks.

A still further form of lock which may be constructed in the case and with some of the parts already described is what may be termed an ofice door lock, shown in Fig. 26. As has already been described, the front door lock shown in Fig. 20 is formed from the vestibule lock shown in Fig. 14 by adding the dead bolt mechanism and a special key-operated hub and rollback. The office door lock, which will now be described, is

formed by adding to the vestibule lock shown in Fig. 14 a guard bolt or dog-controlling plunger and dogging mechanism for the latch bolt, as shown in Figs. 26 to 29. This guard bolt or dogcontrolling plunger and the associated parts are shown in an exploded view in Fig. 29, and comprise a plunger I25 having a beveled head I26 adapted to be protracted through the opening II in the face plate I2. Mounted upon the plunger is a spring I21, a stop Washer I28, and a tail piece I29.

To hold the parts in position in the case. a bracket I30, shown in Fig. 29, is secured to the case by means of screws passing through openings in the base of the bracket; and threadedinto the openings I and I 3| (Fig. 4) in the plate I0. This bracket is provided with an upstanding bifurcated guide member I32 and a hollow post I33. The plunger I is slidably received in the slot in the member I32, with this member disposed between the washer I28, slidably mounted on the plunger, and the tail piece I29.

A dogging lever I34 is pivoted to the post I33 by means of the screw I35, this dogging lever having a downwardly projecting lug I which engages against the lower end of the tail piece I29 and is provided with a semicircular recess I31 in its upper surface, in which it is designed to engage a post I38 on the yoke 42. The front end portion I39 of the lever I34 is adapted in one position of the lever to drop behind the latch bolt I4, as shown in Fig. 28, and dogthis bolt against retraction. The lever I34 is normally urged toward dogging position by a spring I40 mounted upon the screw I35 and having an end which engages the lug I36. In other respects the ofllce door lock is the same as the vestibule look shown in Fig. 14.

The operation of these additional parts for the oiilce door lock is as follows: When the door is open, the latch bolt is urged to protracted position b its spring 39. and the plunger is also urged to protracted position, as shown in Fig. 26, by its spring I21 acting against the washer I23, which in turn acts against the bifurcated member I32. In this protracted position of the plunger I25, the tail piece I29 engages the lug I38 and tends to rotate the lever I34 in a clockwise direction, so that, as shown in Fig. 26, the end I39 of the lever I 34 lies above the latch bolt I4, and

leaves the latter free to move inwardly. When the door is closed the head i20 of the plunger I25 engages a solid portion of the strike plate (not shown) in the lamb, and the plunger I25 is retracted into the look so that the tail piece I 29 no longer engages the lug I 30, and permits the spring I40 to throw the rear end of the lever I34 upwardly to engage the pin I 30 in the recess I31, and also throw the front end I39 of the lever This position of the parts is shown in Fig. 28. When, however, the knob is turned to retract the latch, the post I38, by reason of its engagement in the recess I31, cams the lever I34 in a clockwise direction against the spring I40, and removes the end I33 from engagement with the latch to permit its retraction.

From the foregoing it will be seen that I have devised a system of locks which may all be housed in a standard or made. Also. that the system simple and more complex upper and lower means adjacent its character the more complex locks being constructed by the use of the same parts employed in the simpler locks and additional parts which 1 can be incorporated in the same case. Moreover, certain of the lock mechanisms are interchangeable in that they may be inserted in the case upon the removal of other mechanisms for which they are to be substituted. As a result, the material and parts for manufacturing a large number of any given kind of such locks may be kept in stock and assembled as desired, thus rendering the manufacture of the looks much more flexible and enabling the manufacturer to make them more economically.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and the scope of the appended claims.

What I claim is:

1. A door lock comprising a case having a side plate and a face plate, said face plate having a centrally disposed opening therein for passage of a latch bolt therethrough and also having an additional opening on each side of said centrally disposed opening, said additional openings being adapted for the passage therethrough of either a dead bolt or a dogging bolt, and said side plate being provided with means adjacent each of said second openings for detachably securing thereto a dogging-bolt-guiding member and a dead-boltguiding member.

2. A door lock comprising a case having a side 7 plate and a face plate, said face plate having an opening therein adapted to receive a latch bolt and also having a second opening adapted to receive either a dogging bolt or a dead bolt, and said side plate being provided with means adiacent said second-named opening for detachably securing thereto a dogging-bolt-guiding member and a dead-bolt-guiding member, said means being disposed adjacent the forward edge of thesaid side plate being provided with rear end for supporting a latch-bolt-operating member.

3. A door lock comprising a case having a side plate and a face plate, said face plate having an opening therein adapted to receive a latch bolt and also having a second opening adapted to receive either a dog ing bolt or a dead bolt, and said side plate being provided with means ad- Jacent said second-named opening for detachably securing thereto a dogging-bolt-guiding member and a dead-bolt-guiding member, and said side plate also being provided with an opening adiacent said means to receive the hub of a thumb turn member.

side plate, and

4. A door lock having a case comprising a side plate and a face plate, said face plate being pro vided with a substantially centrally disposed latch bolt opening and additional bolt openings one above and one below said first-named openin said side plate being provided with latch-boltguiding means substantially midway between its edges, said additional openings being adapted to permit the passage therethrough of a dead bolt or a dogging bolt,'and said side plate being provided. above and below said latch-bolt-guiding means, with means for detachably securing thereto guide members for a dead bolt and a dogging bolt, and also provided adjacent each of said means with an opening to receive a thumb turn hub.

HENRY G. VOIGHT. 

